Kladno is a city in the Central Bohemian Region of the Czech Republic. It has about 69,000 inhabitants. It is the largest city in the region and h…Kladno is a city in the Central Bohemian Region of the Czech Republic. It has about 69,000 inhabitants. It is the largest city in the region and has a rich industrial history. The name Kladno is derived from the Czech word kláda, meaning "log". In Old Czech, the word kladno denoted a mature forest from which logs were obtained.